[Gllug] Reversing an SSH connection

Richard Jones rich at annexia.org
Thu Oct 27 19:12:57 UTC 2005


On Thu, Oct 27, 2005 at 03:54:06PM +0100, Rich Walker wrote:
> However, the point is moot, as the client's site *does not permit
> outbound SSH*. (Unless, according to their admin, you run an ssh daemon
> on port 80, at which time it lets that through happily).

Ah, either I didn't understand your original email or else you've just
found out that they're blocking outbound port 22 which is nasty.  Why
not run an ssh daemon on port 80 (outside) then?

Back when I worked with Dan at Red Hat I used to have a shell script
at home which did:

    while true; do
	ssh <various -R options> <a-server-at-redhat-london> \
		'while true;do echo .;sleep 60; done'
	sleep 60
    done

(That is hazily remembered - I think the actual ssh-ing in part was a
mite more complicated than that because RH are very paranoid about
security).

Rich.

-- 
Richard Jones, CTO Merjis Ltd.
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